TL3842DR-8

Frequency - Switching:	Up to 500kHz
Base Part Number:	TL3842
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	97%
Series:	--
Voltage - Supply (Vcc/Vdd):	10 V ~ 30 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost, Flyback, Forward
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

TL3842DR-8 Application Field and Working Principle

The TL3842DR-8 is a precision monolithic buck switching controller designed for regulating switched-mode power supplies (SMPS). It belongs to the category of PMIC – Voltage Regulators – DC DC Switching Controllers. This document discusses the application field and working principle of the TL3842DR-8.

Application Field

The TL3842DR-8 is a special purpose, low-cost buck regulator controller used in a variety of applications. Its main purpose is to control/regulate the output voltage of a step-down DC to DC converter. It can be used to convert a selected input voltage to a specific reduced output voltage, typically 12V or 24V to 5V.The TL3842DR-8 is a pulse width modulated (PWM) controller designed for a wide range of step-down (buck) switching power supplies. It can operate in either the continuous or burst modes, allowing the user to choose the desired power level for an application. It exhibits good transient response and can handle high step rise & fall times needed for high efficiency. The device also integrates a low-power shutdown feature.

Working Principle

The TL3842DR-8 controllers are based on feedback control theory. The controller uses an input voltage feedback signal to compare it to a reference voltage and adjust the output voltage accordingly. This corrected feedback signal is compared with a triangle wave to generate the pulse width modulated output signal that drives the MOSFETs in step down converters.When the output voltage is higher than the desired value, the controller senses the difference and the output voltage decreases. If the output voltage is lower than the desired value, the controller signals the MOSFET to increase the duty cycle of the output pulses until the set point is achieved.The TL3842DR-8 also includes various protections such as Over-Current Protection (OCP), Over-Temperature Protection (OTP), and Under-Voltage Lockout (UVLO). The OCP limits the output current to the specified level and will shut down the device if the current limit is exceeded over a predetermined period of time. The OTP thermostatically keeps the device from exceeding a predetermined temperature by shutting down the MOSFETs. The UVLO monitors the supply voltage and will not enable the device until this voltage is above a predetermined threshold.

Conclusion

The TL3842DR-8 is a low-cost buck regulator controller used in a variety of applications, such as regulating the output voltage of a step-down DC-to-DC converter. It is based on feedback control theory and uses an input voltage feedback signal to adjust the output voltage accordingly. The device also integrates various protections such as OCP, OTP, and UVLO. Overall, the TL3842DR-8 is a reliable and cost-effective solution for a variety of applications in the PMIC – Voltage Regulators – DC DC Switching Controllers category.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description